Attaching member

ABSTRACT

The present teachings provide an attaching member to be attached to a blood purification apparatus including peristaltic pumps, the attaching member holding pump tubes to be squeezed in a predetermined direction by the respective peristaltic pumps for liquid delivery. The attaching member includes a body attachable to a predetermined position of the blood purification apparatus, and holding portions attached to the body and that hold the pump tubes. The holding portions are attached to edge portions on two opposite sides of the body, and flexible tubes that each allow liquid to flow through are to be placed in a central portion of the body, the central portion being positioned between the holding portion on one of the edge portions and the holding portion on the other of the edge portions.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation of International Application No.PCT/JP2019/051339 filed on Dec. 26, 2019, which claims priority toJapanese Application No. 2018-246176, filed on Dec. 27, 2018, the entiredisclosures of which are hereby incorporated by reference.

FIELD

The present teachings relate to an attaching member to be attached to ablood purification apparatus including peristaltic pumps, the attachingmember holding pump tubes to be squeezed in a predetermined direction bythe respective peristaltic pumps for liquid delivery.

BACKGROUND

In general, a blood purification apparatus for giving dialysis treatmentis provided with an arterial blood circuit and a venous blood circuitthat form a blood circuit for causing blood of a patient toextracorporeally circulate, a blood purifier for purifying the bloodextracorporeally circulating through the blood circuit, and varioustreatment devices, such as a blood pump, for performing bloodpurification treatment with the blood circuit and the blood purifier.After the patient is punctured with an arterial puncture needle and avenous puncture needle, the blood pump is activated. Thus, blood of thepatient flows through the arterial blood circuit and the venous bloodcircuit. In such a flowing process, the blood is purified by the bloodpurifier.

Some of blood purification apparatuses according to known proposals eachinclude a plurality of peristaltic pumps for delivering liquids such assubstitution fluid and drain liquid. The peristaltic pumps are providedwith pump tubes, respectively, so that different liquids can bedelivered. Hitherto, for example, an attaching member has been disclosedby PTL 1 that includes a plurality of pump tubes attachable torespective peristaltic pumps included in a blood purification apparatus.The attaching member is to be attached to a predetermined position ofthe blood purification apparatus.

PTL 1: Japanese Unexamined Patent Application Publication No.2017-164285 the teachings of which are expressly incorporated byreference herein for all purposes.

SUMMARY

In the above known attaching member, however, not only a space forplacing the pump tubes but also a space for placing other flexible tubesthat each allow liquid to flow through is limited. Such a situationleads to a problem of complicated arrangement of the flexible tubes oran increase in the size of the body for securing an enough space for theflexible tubes.

The present teachings have been conceived in view of the abovecircumstances and provides an attaching member with which thearrangement of flexible tubes can be prevented from becomingcomplicated, and simultaneously a limited space can be used efficiently.

Variation 1 may comprise an attaching member to be attached to a bloodpurification apparatus including peristaltic pumps, the attaching memberholding pump tubes to be squeezed in a predetermined direction by therespective peristaltic pumps for liquid delivery. The attaching memberincludes a body attachable to a predetermined position of the bloodpurification apparatus, and holding portions attached to the body andthat hold the pump tubes. The holding portions are attached to edgeportions on two opposite sides of the body, and flexible tubes that eachallow liquid to flow through are to be placed in a central portion ofthe body, the central portion being positioned between the holdingportion on one of the edge portions and the holding portion on the otherof the edge portions.

According to variation 2, in the attaching member according to variation1, may comprise the central portion has a recess that is open on a rearside in such a manner as to receive the flexible tubes, with a frontside of the central portion covering the flexible tubes. According tothe variation 3, in the attaching member according to variation 2, maycomprise the body is transparent in at least the central portion.

According to variation 4, in the attaching member according to variation1, may comprise the central portion has a recess that is open on a frontside in such a manner as to receive the flexible tubes, with a rear sideof the central portion covering the flexible tubes.

According to variation 5, in the attaching member according to any ofvariations 1 to 4, the central portion has securing parts where theflexible tubes are to be secured.

According to variation 6, in the attaching member according to any ofvariations 1 to 5, the securing parts are openings through which theflexible tubes are allowed to pass, and the flexible tubes are securableby being passed through the openings.

According to variation 7, there is provided a blood purification circuitconnected to one of the pump tubes according to any of variations 1 to6. The blood purification circuit includes a blood circuit through whichblood is caused to extracorporeally circulate, and a flow route throughwhich substitution fluid is introduced into the blood circuit or a flowroute through which dialysate is introduced into a blood purifierconnected to the blood circuit or drain liquid is discharged from theblood purifier.

According to variation 1, the holding portions are attached to the edgeportions on the two opposite sides of the body, and the flexible tubesthat each allow the liquid to flow through are to be placed in thecentral portion of the body, the central portion being positionedbetween the holding portion on one of the edge portions and the holdingportion on the other of the edge portions. Therefore, the arrangement ofthe flexible tubes can be prevented from becoming complicated, and thelimited space can be used efficiently.

According to variation 2, the central portion has the recess that isopen on the rear side in such a manner as to receive the flexible tubes,with the front side of the central portion covering the flexible tubes.Therefore, the flexible tubes can be placed in the recess. Furthermore,since the flexible tubes are covered by the central portion on the frontside, interference between the flexible tubes and other devices or thelike can be prevented.

According to variation 3, the body is transparent in at least thecentral portion. Therefore, in addition to the prevention ofinterference between the flexible tubes covered by the central portionand other devices or the like, visual checking of the presence/absenceof liquids in the flexible tubes can be facilitated through thetransparent central portion.

According to variation 4, the central portion has the recess that isopen on the front side in such a manner as to receive the flexibletubes, with the rear side of the central portion covering the flexibletubes. Therefore, the flexible tubes can be placed in the recess.Furthermore, the flexible tubes placed in the central portion can bevisually checked directly.

According to variation 5, the central portion has the securing partswhere the flexible tubes are to be secured. Therefore, the flexibletubes can be placed assuredly within the area defined as the centralportion. Consequently, accidental displacement of the flexible tubesplaced in the central portion to another area can be prevented.

According to variation 6, the securing parts are the openings throughwhich the flexible tubes are allowed to pass, and the flexible tubes aresecurable by being passed through the openings. Therefore, the flexibletubes can be placed assuredly within the area defined as the centralportion. Moreover, no space is necessary for securing the flexibletubes. Consequently, the increase in the size of the body can beavoided.

According to variation 7, a blood purification circuit that produces theadvantageous effects according to variations 1 to 6 can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall diagram of a blood purification apparatus, with anattaching member according to an embodiment of the present teachingsattached thereto.

FIG. 2 is an overall diagram of the blood purification apparatus, withthe attaching member yet to be attached thereto.

FIG. 3 is an enlargement of peristaltic pumps, with pump tubes of theattaching member yet to be attached thereto.

FIG. 4 is an enlargement of a part of the blood purification apparatus,with the attaching member anchored thereto.

FIG. 5 illustrates a process of attaching the pump tube to theperistaltic pump of the blood purification apparatus, including diagram(a) illustrating a state before an anchor member is moved, diagram (b)illustrating a state after the anchor member is moved but before loadingis complete, and diagram (c) illustrating a state after loading iscomplete.

FIG. 6 illustrates a process of detaching the pump tube from theperistaltic pump of the blood purification apparatus, including diagram(a) illustrating a state before the anchor member is moved, diagram (b)illustrating a state after the anchor member is moved but beforeunloading is complete, and diagram (c) illustrating a state afterunloading is complete.

FIG. 7 is a perspective view of the attaching member according to thepresent embodiment.

FIG. 8 is a front view of the attaching member.

FIG. 9 is a sectional view taken along line IX-IX illustrated in FIG. 8.

FIG. 10 is a sectional view taken along line X-X illustrated in FIG. 8.

FIG. 11 is a perspective view of the attaching member, with holdingportions thereof holding pump tubes.

FIG. 12 is a front view of the attaching member holding the pump tubes.

FIG. 13 is a side view of the attaching member holding the pump tubes.

FIG. 14 is a front perspective view of the attaching member, withflexible tubes secured thereto by being passed through openings providedtherein.

FIG. 15 is a rear perspective view of the attaching member, with theflexible tubes secured thereto by being passed through the openingsprovided therein.

FIG. 16 is a second-angle projection of the attaching member, with theflexible tubes secured thereto by being passed through the openingsprovided therein.

FIG. 17 includes diagrams illustrating sections of (a) a lid and (b) theopening of the attaching member, and (c) the flexible tube.

FIG. 18 is a perspective view of an attaching member according toanother embodiment of the present teachings.

FIG. 19 is a second-angle projection of the attaching member.

FIG. 20 is a perspective view of an attaching member according to yetanother embodiment of the present teachings.

FIG. 21 is a second-angle projection of the attaching member.

FIG. 22 is a plan view illustrating yet another embodiment of thepresent teachings.

FIG. 23 is a diagram of a blood purification apparatus with theattaching member attached thereto, and is provided for describing bloodpurification treatment.

DETAILED DESCRIPTION

Embodiments of the present teachings will now be described specificallywith reference to the drawings.

An attaching member according to an embodiment is to be attached to ablood purification apparatus including peristaltic pumps. The attachingmember holds pump tubes to be squeezed in a predetermined direction bythe respective peristaltic pumps for liquid delivery. As illustrated inFIGS. 1 to 13, the attaching member includes a body 2 attachable to apredetermined position Ba of a blood purification apparatus B, andholding portions 3 attached to the body 2 and that hold pump tubes C.

As illustrated in FIGS. 7 to 16, the attaching member 1 is a resinmolded component in which the body 2 and the holding portions 3 areformed continuously with each other. When the component is folded atfolds K extending along the boundaries between the body 2 and theholding portions 3, the holding portions 3 are placed on the front faceof the body 2 as illustrated in FIG. 7. The folds K each haveperforations or the like. Therefore, the holding portions 3 are easilyfoldable with respect to the body 2.

As illustrated in FIGS. 7 to 13, the body 2 according to the presentembodiment is a rectangular resin molded part and has inclined surfaces2 a (edge portions) provided on two opposite sides thereof,respectively. The inclined surfaces 2 a are each inclined at apredetermined angle α with respect to the bottom surface of the body 2(an attaching surface that faces the predetermined position Ba).Furthermore, the body 2 includes a central portion 2 b positioned in thecenter thereof and between the left and right inclined surfaces 2 a.Specifically, the body 2 has the central portion 2 b in the centerthereof, with the inclined surfaces 2 a at the angle α extending fromthe central portion 2 b toward the left and right sides, respectively.The inclined surfaces 2 a carry a plurality of (four in the presentembodiment) holding portions 3.

The holding portions 3 are each a resin molded part projecting in ablock-like shape from the body 2 (projecting frontward). As illustratedin FIGS. 11 and 12, the holding portions 3 have holding grooves 3 a,into each of which one of connectors D provided at two respective endsof each of the pump tubes C is to be fitted, whereby the connectors Dare securable at a predetermined height. In short, the connectors D aresecured by being fitted into the holding grooves 3 a, whereby the pumptubes C are held by the holding portions 3 as illustrated in FIGS. 11 to13. Furthermore, as illustrated in FIG. 9, the holding portions 3 haveanchoring holes 3 b (anchoring parts) in predetermined areas thereof andare therefore anchorable by anchor members A included in the bloodpurification apparatus B.

The pump tubes C are each made of a material such as soft resin orrubber forming a flow route with a relatively large diameter. Each pumptube C has the connectors D at one end and the other end thereof,respectively. After the pump tubes C are fitted into respective statorsS of the peristaltic pumps P, respective rotors R are driven to rotate.Thus, the pump tubes C are squeezed in the lengthwise direction byrollers Ra, so that liquids such as substitution fluid and drain liquidcan be delivered.

As illustrated in FIGS. 9, 10, and 13, the holding portions 3 accordingto the present embodiment are provided on the inclined surfaces 2 a.Therefore, the pump tubes C each extend at the predetermined angle α(inclined along the inclined surface 2 a) with respect to the bottomsurface of the body 2 (the attaching surface that faces thepredetermined position Ba). In other words, the holding portions 3according to the present embodiment hold the connectors D of the pumptubes C in an inclined state. Specifically, the holding portions 3 holdthe pump tubes C such that the pump tubes C are inclined in a directionin which the pump tubes C are fitted to the peristaltic pumps P (adownward direction in FIG. 13).

The body 2 according to the present embodiment is configured as follows.The holding portions 3 are attached to the edge portions (inclinedsurfaces 2 a) on the two opposite sides of the body 2. Flexible tubes(r) that allow liquids to flow through are placed in the central portion2 b positioned between the holding portions 3 on one of the edgeportions (inclined surfaces 2 a) and the holding portions 3 on the otherof the edge portions (inclined surfaces 2 a). The flexible tubes (r)placed in the central portion 2 b are either flexible tubes connected tothe connectors D of the pump tubes C or flexible tubes extending fromother devices.

As illustrated in FIGS. 15 and 16, the central portion 2 b of the body 2according to the present embodiment has a recess T that is open on therear side (the side as the attaching surface facing the bloodpurification apparatus B) in such a manner as to receive the flexibletubes (r), with the front side (the side opposite the attaching surface)thereof covering the flexible tubes (r). In other words, the centralportion 2 b of the body 2 according to the present embodiment has therecess T (a concavity) that is open on the rear side. In front view, theflexible tubes (r) are hidden. The flexible tubes (r) (such as tubesconnected to the connectors D of the pump tubes C) are received in sucha manner as to run along the recess T that is open on the rear side. Itis preferable that the body 2 be transparent in at least the centralportion 2 b thereof so that the flexible tubes (r) behind the centralportion 2 b are visible.

As illustrated in FIGS. 1 to 3, the blood purification apparatus Bapplied to the present embodiment is a monitoring apparatus forhemodialysis treatment that includes a monitor M capable of displayinginformation regarding blood purification treatment and the like, a bloodpump N, and so forth. When the blood pump N is activated, blood of apatient is caused to extracorporeally circulate through a blood circuit.Meanwhile, the blood undergoes blood purification treatment in a bloodpurifier (a dialyzer). The blood purification apparatus B according tothe present embodiment includes a plurality of (seven in the presentembodiment) peristaltic pumps P provided on the front face thereof, sothat substitution fluid and drain liquid can be delivered in the bloodpurification treatment.

The peristaltic pumps P are each capable of delivering liquid bysqueezing the pump tube C in a specific direction and each include, asillustrated in FIGS. 3 to 6, the stator S having a fitting recess Sa,the rotor R provided in the fitting recess Sa and being rotatable abouta rotating shaft L, and the rollers Ra provided on the rotor R. When thepump tube C is fitted into the fitting recess Sa of the stator S and therotor R is driven to rotate, the pump tube C is squeezed between thewall of the fitting recess Sa and the rollers Ra. Thus, the liquid canbe delivered.

The rotor R has an upper guide pin a1 and a lower guide pin a2 providedin a pair, and an upper guide pin b1 and a lower guide pin b2 providedin a pair, all of which project from the rotor R. The pump tube C is tobe fitted between the upper guide pin a1 and the lower guide pin a2 andbetween the upper guide pin b1 and the lower guide pin b2. The upperguide pins a1 and b1 are positioned on the open side of the fittingrecess Sa. The lower guide pins a2 and b2 are positioned on the bottomside of the fitting recess Sa. Thus, displacement of the pump tube Cfitted in the fitting recess Sa from a predetermined position (aposition where the pump tube C is squeezable by the rollers Ra) issuppressed.

The blood purification apparatus B according to the present embodimentreceives the attaching member 1 attachable to the predetermined positionBa on the front face thereof, where the peristaltic pumps P areprovided. Specifically, as illustrated in FIG. 4, the blood purificationapparatus B according to the present embodiment has a positioning pin(g). When the positioning pin (g) is inserted into a positioning hole(h) provided in the body 2 of the attaching member 1, the attachingmember 1 can be positioned at the predetermined position Ba of the bloodpurification apparatus B.

As illustrated in FIG. 2, the blood purification apparatus B accordingto the present embodiment further has a plurality of anchor members A atthe predetermined position Ba. Meanwhile, as described above, theholding portions 3 have the anchoring holes 3 b (the anchoring parts) atwhich the holding portions 3 are anchorable by the anchor members A. Theanchor members A each include an anchor hook on one side of the distalend thereof, and a pushing portion on the other side. The anchor hook ishooked on the peripheral edge of the anchoring hole 3 b. Thus, theattaching member 1 is anchored by the anchor member A and is secured tothe predetermined position Ba.

In a state where the attaching member 1 is positioned by the positioningpin (g) and is anchored at the anchoring holes 3 b (the anchoring parts)by the anchor hooks of the anchor members A, as illustrated in FIG.5(a), proximal portions Ca and a distal portion Cb of each of the pumptubes C held by the holding portions 3 are positioned above the upperguide pins a1 and b1 of a corresponding one of the peristaltic pumps P.Meanwhile, the rotor R of each of the peristaltic pumps P is stopped ata predetermined position (see FIGS. 2 to 4). In such an anchoring state,the anchor member A is moved in such a direction as to sink into thepredetermined position Ba (a direction in which the attaching member 1is moved toward the predetermined position Ba). Then, as illustrated inFIG. 5(b), the proximal portions Ca of the pump tube C are positionedbetween the upper guide pin b1 and the lower guide pin b2, while thedistal portion Cb of the pump tube C is positioned above the upper guidepin a1.

In such a state, the rotor R is driven to rotate. Then, as illustratedin FIG. 5(c), while the proximal portions Ca of the pump tube C arepositioned between the upper guide pin a1 and the lower guide pin a2,the distal portion Cb of the pump tube C interferes with the upper guidepin b1 and is drawn to a position between the upper guide pin b1 and thelower guide pin b2. Thus, the pump tube C is set in the peristaltic pumpP. Such attaching work of setting the pump tube C by drawing the pumptube C to the position between the upper guide pin a1 and the lowerguide pin a2 is also referred to as loading.

On the other hand, in the state where the pump tube C is set in theperistaltic pump P as illustrated in FIG. 6(a) with the anchor member Aanchoring at the anchoring hole 3 b (the anchoring part), the anchormember A is moved in such a direction as to project (a direction inwhich the attaching member 1 is lifted from the predetermined positionBa). Then, the pushing portion of the anchor member A pushes theperipheral edge of the anchoring hole 3 b and lifts the pump tube C fromthe fitting recess Sa. Meanwhile, the rotor R of each of the peristalticpumps P is stopped at the same predetermined position (see FIGS. 2 to 4)as in the case of the loading of the pump tube. Furthermore, asillustrated in FIG. 6(b), the distal portion Cb of the pump tube C ispositioned between the upper guide pin a1 and the lower guide pin a2,and the proximal portions Ca of the pump tube C are positioned above theupper guide pin b1.

In such a state, the rotor R is driven to rotate. Then, as illustratedin FIG. 6(c), while the proximal portions Ca of the pump tube C arepositioned above the upper guide pin a1, the distal portion Cb of thepump tube C interferes with the upper guide pin b1 and is pushed to aposition above the upper guide pin b1. Thus, the pump tube C that hasbeen set in the peristaltic pump P is unset and is allowed to bedetached. Such detaching work of unsetting the pump tube C by pushingout the pump tube C from the position between the upper guide pin a1 andthe lower guide pin a2 is also referred to as unloading.

As illustrated in FIGS. 14 to 16, the central portion 2 b of the body 2according to the present embodiment has openings (H1 to H4) throughwhich flexible tubes (r1 and r2) are allowed to pass. The flexible tuber1 is securable by being passed through the openings (H1 and H2). Theflexible tube r2 is securable by being passed through the openings (H3and H4). Specifically, the openings (H1 to H4) are provided in pairs(the opening H1 and the opening H2 are paired, and the opening H3 andthe opening H4 are paired), the openings in each of the pairs beingspaced apart from each other. The flexible tubes (r1 and r2) are eachsecurable by being passed through a corresponding one of the pairs ofopenings (the openings H1 and H2, and the openings H3 and H4).

More specifically, the flexible tube r1 is made to pass through theopening H1 from the front side of the body 2 to the inside of the recessT provided on the rear side of the central portion 2 b, run along therecess T, and pass through the opening H2 to the front side of the body2. Thus, the flexible tube r1 is secured by being passed through thepair of openings (H1 and H2). Likewise, the flexible tube r2 is made topass through the opening H3 from the front side of the body 2 to theinside of the recess T provided on the rear side of the central portion2 b, run along the recess T, and pass through the opening H4 to thefront side of the body 2. Thus, the flexible tube r2 is secured by beingpassed through the pair of openings (H3 and H4).

In the present embodiment, as illustrated in FIG. 17(a), a plurality oflids H that cover the openings are provided, and the flexible tubes (r)are allowed to pass through the openings when the lids H are removed.For example, part of each lid H is connected to the central portion 2 bof the body 2. When the lid H is pushed by a finger, the connected partis cut or folded, whereby the opening H1 (or any of H2 to H4) isobtained as illustrated in FIG. 17(b). Alternatively, the openings (H1to H4) may be provided with no lids H, and the flexible tubes (r) may bepassed through any of the openings (H1 to H4).

The openings (H1 to H4) may each have an inside diameter t1 (see FIG.17(b)) that is smaller than an outside diameter t2 of a correspondingone of the flexible tubes (r). In such a case, the flexible tubes (r)are press-fitted into the openings (H1 to H4) when being passedtherethrough. It is preferable that the inside diameter t1 of each ofthe openings (H1 to H4) be set in accordance with (the material,thickness, or the like of) a corresponding one of the flexible tubes (r)or the position where the flexible tube r is to be secured. In such acase, since the degree of press-fitting varies with the differencebetween the inside diameter t1 and the outside diameter t2, the force ofholding the flexible tube r can be adjusted arbitrarily.

The central portion 2 b of the body 2 according to the presentembodiment has the recess T that is open on the rear side in such amanner as to receive the flexible tubes (r), with the front side (theside opposite the attaching surface) thereof covering the flexible tubes(r). Alternatively, as illustrated in FIGS. 18 and 19, the centralportion 2 b may have a recess T that is open on the front side in such amanner as to receive the flexible tubes (r), with the rear side thereofcovering the flexible tubes (r). In such a case as well, the openings(H1 to H4) as securing parts are provided in the recess T provided inthe central portion 2 b, and the flexible tubes (r) received by therecess T are secured by being passed through the openings (H1 to H4).

As another alternative, as illustrated in FIGS. 20 and 21, the centralportion 2 b of the body 2 may form a flat surface with no recess T, andthe flexible tubes (r) may be placed on the flat surface. In such a caseas well, the openings (H1 to H4) as securing parts are provided in theflat central portion 2 b, and the flexible tubes (r) are secured bybeing passed through the openings (H1 to H4).

In the present embodiment, the lids H are given respective marks bywhich the openings are identifiable. For example, the marks may benumbers provided on the lids H as in the present embodiment or may beany of various other symbols, characters, shapes, and colors that areusable as identifiers. Moreover, a configuration that enables theidentification of which of the openings are occupied by the flexibletubes (r) may be employed. In such a case, which of the openings are tobe used for receiving flexible tubes (r) can be set for each ofdifferent treatments.

When the attaching member 1 is anchored to the predetermined position Baof the blood purification apparatus B and the pump tubes C are loadedonto the respective peristaltic pumps P, a treatment apparatus for bloodpurification treatment is established as illustrated in FIG. 23. Thetreatment apparatus includes a blood circuit U including a dialyzer Q; afirst dialysate introduction line L1 a and a second dialysateintroduction line L1 b through which dialysate is introduced into thedialyzer Q; a first substitution line L2 a, a second substitution lineL2 b, a pre-substitution line L2 c, and a post-substitution line L2 dthrough which substitution fluid is supplied to the blood circuit U; anda first drain-liquid discharge line Lia and a second drain-liquiddischarge line L3 b through which drain liquid is discharged from thedialyzer Q.

The blood circuit U includes an arterial blood circuit Ua and a venousblood circuit Ub. When the blood pump N is activated while a patient ispunctured with the distal ends of the arterial blood circuit Ua and thevenous blood circuit Ub, blood of the patient can be caused toextracorporeally circulate. The dialyzer Q has a blood introduction portQa, a blood delivery port Qb, a dialysate introduction port Qc, and adialysate delivery port Qd all projecting from a housing thereof. Thearterial blood circuit Ua is connected to the blood introduction portQa. The venous blood circuit Ub is connected to the blood delivery portQb. The second dialysate introduction line L1 b is connected to thedialysate introduction port Qc. The first drain-liquid discharge line L3a is connected to the dialysate delivery port Qd.

The first dialysate introduction line L1 a is connected to a dialysatebag W1 that stores dialysate and is also connected to the seconddialysate introduction line L1 b through a temporary chamber T. When theperistaltic pumps P provided to the first dialysate introduction line L1a and the second dialysate introduction line L1 b are activated, thedialysate in the dialysate bag W1 is temporarily stored in the temporarychamber T and is then introduced into the dialyzer Q.

The first substitution L2 a is connected to a substitution-fluid bag W2that stores substitution fluid and is also connected to the secondsubstitution line L2 b through a temporary chamber T. The secondsubstitution line L2 b is connected to the blood circuit U through thepre-substitution line L2 c connected to the arterial blood circuit Uaand through the post-substitution line L2 d connected to the venousblood circuit Ub. The post-substitution line L2 d is provided with acheck valve V1. When the peristaltic pumps P provided to the firstsubstitution line L2 a and the second substitution line L2 b areactivated, the substitution fluid in the substitution-fluid bag W2 istemporarily stored in the temporary chamber T and is then introducedinto the arterial blood circuit Ua or the venous blood circuit Ub inaccordance with the state of operation of the peristaltic pump Pprovided to the pre-substitution line L2 c.

The first drain-liquid discharge line L3 a is connected to the dialyzerQ and is also connected to the second drain-liquid discharge line L3 bthrough a temporary chamber T. The second drain-liquid discharge line L3b allows the drain liquid to be discharged therethrough to the outsideof the apparatus. When the peristaltic pumps P provided to the firstdrain-liquid discharge line L3 a and the second drain-liquid dischargeline L3 b are activated, the drain liquid in the dialyzer Q istemporarily stored in the temporary chamber T and is then allowed to bedischarged to the outside of the apparatus.

As described above, the pump tubes C of the attaching member 1 areconnected to the flow routes (the first substitution line L2 a, thesecond substitution line L2 b, and the pre-substitution line L2 c)through which the substitution fluid is introduced into the bloodcircuit U, the flow routes (the first dialysate introduction line L1 aand the second dialysate introduction line L1 b) through which thedialysate is introduced into the dialyzer Q (a blood purifier) connectedto the blood circuit U, and the flow routes (the first drain-liquiddischarge line L3 a and the second drain-liquid discharge line L3 b)through which the drain liquid is discharged from the dialyzer Q (theblood purifier). The post-substitution line L2 d may also be connectedto one of the pump tubes C of the attaching member 1.

In the present embodiment, none of the pump tubes C of the attachingmember 1 is attached to the blood pump N. Alternatively, one of the pumptubes C of the attaching member 1 may be attached to the blood pump N byloading the pump tube C thereon. In such a case, what is to be connectedto the pump tube C of the attaching member 1 is the blood circuit U.That is, devices that are loadable onto the pump tubes C of theattaching member 1 according to the present teachings include a bloodpurification circuit that includes the following: the blood circuit Uthrough which the blood is caused to extracorporeally circulate; and theflow routes (the first substitution line L2 a, the second substitutionline L2 b, and the pre-substitution line L2 c (or the post-substitutionline L2 d)) through which the substitution fluid is introduced into theblood circuit U, the flow routes (the first dialysate introduction lineL1 a and the second dialysate introduction line L1 b) through which thedialysate is introduced into the dialyzer Q (the blood purifier)connected to the blood circuit U, or the flow routes (the firstdrain-liquid discharge line L3 a and the second drain-liquid dischargeline L3 b) through which the drain liquid is discharged from thedialyzer Q (the blood purifier).

According to the above embodiment, the body 2 has the openings (H1 toH4) through which the flexible tubes (r1 and r2) that allow liquids toflow through are allowed to pass. Furthermore, the flexible tubes (r1and r2) are securable by being passed through the openings (H1 to H4).Therefore, the flexible tubes (r1 and r2) can be secured assuredly withefficient use of a limited space. The openings (H1 to H4) may each havean inside diameter t1 that is smaller than the outside diameter t2 of acorresponding one of the flexible tubes (r1 and r2). In such a case, theflexible tubes (r1 and r2) can be secured firmly by being press-fittedinto the openings (H1 to H4). Therefore, the flexible tubes (r1 and r2)can be secured more assuredly with efficient use of the limited space.The inside diameter t1 of each of the openings (H1 to H4) may be set inaccordance with a corresponding one of the flexible tubes (r1 and r2) orthe position where the flexible tube (r1 or r2) is to be secured. Insuch a case, the force of holding the flexible tube (r1 or r2) can beadjusted arbitrarily. That is, the flexible tube (r1 or r2) can besecured with a holding force that accords with the flexible tube (r1 orr2) or the position where the flexible tube (r1 or r2) is to be secured.

The openings (H1 to H4) according to the present embodiment are providedin pairs, the openings in each of the pairs being spaced apart from eachother. Furthermore, the flexible tubes (r1 and r2) are each securable bybeing passed through a corresponding one of the pairs of openings (H1 toH4). Therefore, each of the flexible tubes (r1 and r2) can be held attwo positions and can thus be secured more assuredly.

The lids H that cover the openings (H1 to H4) are provided, and theflexible tubes (r1 and r2) are allowed to pass through the openings (H1to H4) when the lids H are removed. Therefore, any of the lids Hprovided to the openings (H1 to H4) may be removed, so that selectedones of the openings (H1 to H4) can be opened for securing the flexibletubes (r1 and r2). Furthermore, marks by which the openings (H1 to H4)are identifiable are provided. Therefore, workers can visually recognizewhich of the openings (H1 to H4) are to be used for receiving theindividual flexible tubes (r1 and r2). Consequently, the occurrence of asituation where the flexible tubes (r1 and r2) may be passed throughwrong openings (H1 to H4) can be suppressed. If which of the openings(H1 to H4) are to be used for receiving the individual flexible tubes(r1 and r2) is set for each of different treatments, the setting can bechanged easily. Consequently, the attaching member 1 can be used indifferent treatments easily.

If a configuration that enables the identification of which of theopenings (H1 to H4) are occupied by the flexible tubes (r1 and r2) isemployed, a situation where the flexible tubes (r1 and r2) have beenpassed through wrong openings (H1 to H4) can be recognized and notifiedof. Furthermore, if which of the openings (H1 to H4) are to be used forreceiving the individual flexible tubes (r1 and r2) is set for each ofdifferent treatments, the treatment to be performed with the bloodpurification apparatus B can be recognized by identifying which of theopenings (H1 to H4) are used for securing.

The holding portions 3 are attached to each of the edge portions(inclined surfaces 2 a) on the two opposite sides of the body 2. Theflexible tubes (r) that allow liquids to flow through are placed in thecentral portion 2 b positioned between the holding portions 3 on one ofthe edge portions (inclined surfaces 2 a) and the holding portions 3 onthe other of the edge portions (inclined surfaces 2 a). Therefore, thearrangement of the flexible tubes (r) can be prevented from becomingcomplicated, and the limited space can be used efficiently.

The central portion 2 b according to the present embodiment has therecess T that is open on the rear side in such a manner as to receivethe flexible tubes (r), with the front side thereof covering theflexible tubes (r). Therefore, the flexible tubes (r) can be placed inthe recess T. Furthermore, since the flexible tubes (r) are covered bythe central portion 2 b on the front side, interference between theflexible tubes (r) and other devices or the like can be prevented. It ispreferable that the body 2 be transparent in at least the centralportion thereof. In such a case, in addition to the prevention ofinterference between the flexible tubes (r) covered by the centralportion 2 b and other devices or the like, visual checking of thepresence/absence of liquids in the flexible tubes (r) can be facilitatedthrough the transparent central portion 2 b.

As illustrated in FIGS. 18 and 19, the central portion 2 b may have arecess T that is open on the front side in such a manner as to receivethe flexible tubes (r), with the rear side thereof covering the flexibletubes (r). In such a case as well, the flexible tubes (r) can be placedin the recess T. Furthermore, the flexible tubes (r) placed in thecentral portion 2 b can be visually checked directly. Note that thecentral portion 2 b according to the present embodiment has the securingparts (the openings (H1 to H4)) where the flexible tubes (r) are to besecured. Therefore, the flexible tubes (r) can be placed assuredlywithin the area defined as the central portion 2 b. Consequently,accidental displacement of the flexible tubes (r) placed in the centralportion 2 b to another area can be prevented.

The securing parts (the securing parts provided in the central portion 2b) according to the present embodiment are the openings (H1 to H4)through which the flexible tubes (r) are allowed to pass, and theflexible tubes are securable by being passed through the openings (H1 toH4). Therefore, the flexible tubes (r) can be placed assuredly withinthe area defined as the central portion 2 b. Moreover, no space isnecessary for securing the flexible tubes (r). Consequently, theincrease in the size of the body can be avoided.

While some embodiments have been described above, the present teachingsare not limited thereto. For example, as illustrated in FIG. 22, thebody 2 may have a slit t that connects each pair of openings. In such acase, the work of passing the flexible tubes (r) through the respectivepairs of openings (H1 to H4) can be facilitated. Furthermore, which ofthe openings (H1 to H4) are paired can be recognized clearly. Therefore,the occurrence of a situation where the flexible tubes (r) may be passedthrough wrong openings (H1 to H4) can be suppressed.

While the above embodiments each concern a case where the openings (H1to H4) as the securing parts for securing the flexible tubes (r) areprovided in the central portion 2 b of the body 2, the securing partsmay be in another form or may be omitted. The holding portions 3according to each of the above embodiments are continuous with andfolded with respect to the body 2 and are rockable about the folds K.Alternatively, the holding portions 3 may be formed on the body 2continuously therewith in such a manner as not to be rockable(displaceable). The positions of the positioning pin (g) and thepositioning hole (h) may be defined arbitrarily. Moreover, the presentteachings may be applied to a blood purification apparatus B includingno positioning pin (g), with the attaching member 1 having nopositioning hole (h).

The attaching member may have other additional functions or the like, aslong as holding portions are attached to edge portions on two oppositesides of a body, and flexible tubes that each allow liquid to flowthrough are to be placed in a central portion of the body, the centralportion being positioned between the holding portion on one of the edgeportions and the holding portion on the other of the edge portions.

REFERENCE SIGN LIST

-   -   1 attaching member    -   2 body    -   2 a inclined surface    -   2 b central portion    -   3 holding portion    -   3 a holding groove    -   3 b anchoring hole (anchoring part)    -   K fold (rocking axis)    -   A anchor member    -   Aa anchor hook    -   Ab pushing portion    -   B blood purification apparatus (monitoring apparatus)    -   Ba predetermined position    -   C pump tube    -   D connector    -   M monitor    -   P peristaltic pump    -   S stator    -   Sa fitting recess    -   R rotor    -   Ra roller    -   a1, b1 upper guide pin    -   a2, b2 lower guide pin    -   L rotating shaft    -   g positioning pin    -   h positioning hole    -   H1 to H4 opening    -   H lid

1. An attaching member to be attached to a blood purification apparatusincluding peristaltic pumps, the attaching member holding pump tubes tobe squeezed in a predetermined direction by the respective peristalticpumps for liquid delivery, the attaching member comprising: a bodyattachable to a predetermined position of the blood purificationapparatus; and holding portions attached to the body and that hold thepump tubes, wherein the holding portions are attached to edge portionson two opposite sides of the body, and flexible tubes that each allowliquid to flow through are to be placed in a central portion of thebody, the central portion being positioned between the holding portionon one of the edge portions and the holding portion on the other of theedge portions.
 2. The attaching member according to claim 1, wherein thecentral portion has a recess that is open on a rear side in such amanner as to receive the flexible tubes, with a front side of thecentral portion covering the flexible tubes.
 3. The attaching memberaccording to claim 2, wherein the body is transparent in at least thecentral portion.
 4. The attaching member according to claim 1, whereinthe central portion has a recess that is open on a front side in such amanner as to receive the flexible tubes, with a rear side of the centralportion covering the flexible tubes.
 5. The attaching member accordingto claim 1, wherein the central portion has securing parts where theflexible tubes are to be secured.
 6. The attaching member according toclaim 1, wherein the securing parts are openings through which theflexible tubes are allowed to pass, and the flexible tubes are securableby being passed through the openings.
 7. A blood purification circuitconnected to one of the pump tubes according to claim 1, the bloodpurification circuit comprising a blood circuit through which blood iscaused to extracorporeally circulate, and a flow route through whichsubstitution fluid is introduced into the blood circuit or a flow routethrough which dialysate is introduced into a blood purifier connected tothe blood circuit or drain liquid is discharged from the blood purifier.